(Question 1-3): Six employees L, M, N, O, P and R are being assigned to officers, each of which can accomodate two person and no more than two. Each person must be assigned to exactly one office and must be assigned to that office either alone or else together with one other member of the group six. Enough offices are available to permit any possible assignment of group members to offices, but the following restrictions must be observed: M cannot share an office with N. N cannot share an office with O. P and R must share an office together. Q- If P and R the only ones who share an office, how many offices are the minimum that can accomodate the group?